package com.changgou.file.controller;

import com.changgou.entity.Result;
import com.changgou.entity.StatusCode;
import com.changgou.file.util.FastDFSClient;
import com.changgou.file.util.FastDFSFile;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
@RequestMapping("/file")
public class FileController {

  @PostMapping("/upload")
  public Result uploadFile(MultipartFile file) {
    try {
      //1. 判断当前文件是否存在
      if (file == null) {
        throw new RuntimeException("文件不存在");
      }
      //2. 获得当前文件的完整名称
      String originalFilename = file.getOriginalFilename();
      if (StringUtils.isEmpty(originalFilename)) {
        throw new RuntimeException("文件不存在");
      }

      //3.获取当前文件的扩展名称 如abd.jpg,我们只需要获取jpg即可
      String extName = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);
      //4. 获取当前文件的内容
      byte[] content = file.getBytes();
      //5. 创建上传文件的封装实体类
      FastDFSFile fastDFSFile = new FastDFSFile(originalFilename,content,extName);

      //6.基于工具类文件上传,并接受返回参数.upload:包含文件组名和文件路径
      String[] uploadResult = FastDFSClient.upload(fastDFSFile);
      //7.封装返回结果,
      //7.1 首先获取FastDFS的访问路径, 拼接完整路径
      String url = FastDFSClient.getTrackerUrl()+ uploadResult[0] + "/" + uploadResult[1];
      return new Result(true, StatusCode.OK, "文件上传成功",url);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return new Result(false, StatusCode.ERROR, "文件上传失败");
  }
}
